I come to add my old timer agreement here. This does tend to lead to a lot of NIMBY ism - walled gardens of code that only I (or my team) know how to use. But

I come to add my old timer agreement here. This does tend to lead to a lot of NIMBY ism - walled gardens of code that only I (or my team) know how to use. But then sometimes we grumpily admit that someone else's solution (either OSS or elsewhere in the org) is actually better and we use that. if we make that decision based on our experience of trying and failing to beat them. Repeat this and what you end up with is a shared core of libraries that have been agreed to be the best by informed electorate. Surely the best outcome.